Add KotlinParser to the maven plugin.

[traceyyoshima]

The majority of Kotlin sources in the default repository list as of 4/5/23 are from Maven projects which causes the files to be Quarks.

[timtebeek]

Now likely handled through https://github.com/search?q=repo%3Aopenrewrite%2Frewrite-all%20kotlin&type=code , which should make it's way here.

[traceyyoshima]

Closing as a duplicate of #526.
We found that most of the Kotlin projects were Gradle.
However, many of the Gradle projects used the Android plugin.

Until recently, no one had asked for the KotlinParser in a maven project, so it hasn't been a priority.